Concrete insert



April 21, 1942*. N. A. PREDAN coNcRETnINsERT' Filed Nov. 15, 1939 Patented Apr. 21, `1942 t 'I j .t t

i `UNl''l-:D STATES `PATENT OFFlCEi CONCRETE INSERT Nicholas A. Fredan, ChicagIllL l l Application ovcmber' 13, 1939, scriallNo; 303,930

` @claims (ome-465i l fThis invention, 'which relates to an insert adapted to .be embedded in a body oflconcrete t or other plastic material,` is concerned' withil) a two-part assembly which is advantageous for various reasons, and 2) `certain featuresof im` provement which tendto a strong, `inexpensive insert body, with special provision for preventing entrance thereinto of fluid concrete, during the pouring stage or subsequently, the closure means, byvwhich the entrance of concrete is` prevented; .being displaceable from the exposed faceofthe `insert body whereby g to lprovide an4 elongated opening through which maybe inserted a nut 'and1b0lt, the latter having capacity fors1iding l movement whereby an adjustable suspension support is obtained. Theseyandother objects ofmy invention, as will morefully hereinafter appear, may` be realized from a. concrete insert, of which a preferred `embodiment is illustrated inthe accompanying drawing, "wherein-- Figure l isa view in perspective of the insert per se, looking down upon1the side which is innermost when embedded within a body of concrete or other plastic material;

Fig.` 2, which is a similar view, shows the insert as it appears when viewed `from the opposite direction; A y 1 H Fig. 3 is a longitudinal sectionthrough the insert in the position which it occupiesv upon a form, prior `to pouring of the concrete;

1 Fig. 4 is a similar view `taken `on line 4-4 of Fig. 5, which is a view similar to Fig. 3, shows a .percussion tool in process of dislodging the closure from theinsertbody; i

i Fig. 6, which is a transverse section through the insert after removal of the closure, shows a nut being inserted by -a side-wise movement through the elongated slot formerly occupied by` the closure; v

Fig. 7, which is la view similar to Fig. 5, shows a bolt entered through the slot and in `engagement with the nut within the insert; and

` Fig. 8 is a detail of an integral` riveted connection which may be employedto secure toprising a center wall I5, side walls i6, and oppositely extending base flanges Il V which, through offsets IB, connect with out-turned feet I9, the latter having, by preference, adjacent their outer edges, `one or more notches `Zil'wherein nails 2|` are disposed when driven into the t the form removed fromthe embedded insert and form F.4 When the` channel `piece is fitted in place, it occupies the entire space transversely t within the strap, and the offsets overlie the edges i ofthe strap feet so that the two `channel feet `I 9 occupy positions which are substantially flush with the middle `section of the insert (see Fig.r 4). --Whenso assembled, the channelpiece may bepermanently secured as `by spot welds 22,; or (see` Fig. 8), by spreading, by percussion, the heads 22% of bosses 22b each `of which extends up from. themiddle section 8 of the U-strapto lie within` an opening 22 in a .base flange Il of the channel 'piece thereby providing in effect an integral rivetedconnection therebetween. Immediately above the center wall of the channel piecefin each of the strap sections is van opening 23 throughiwhich may be extended a rod 24 (seetFig. 3) `the endsof which protrude beyond the `feet of the strap so as to be `exposed for keying Within the concrete lbody for additional securement of the insert therewithin.`

z In.r the middle section of the insert is formed the;contour of anelongated slot s produced de` sirably by a slight displacement of a metallic slug 25,which is to `be removed `for the formation of the slot. This slug is initially displaced slight- `1y inwardly from the outer face of the str-ap middle section, a sufficient -union remaining between the slug andthe strap to hold the slug xedly in place until a percussion tool 26, such as is suggested in Fig. 5, is employed to deliver an impact to the slug whereby to causeits complete displacement from the strap. During this operation the slug is pushed inwardly so` as to enter the enclosed space or chamber within the housing. Its removal therefrom may be easily effected as by turning the slug on its side and then `withdrawing it with the fingers, or any small tool that may be convenient. It will be observed that, by reason of its elongated character, passage of the slug through the slot will be facilitated since it may be moved either edget wise or endwise free of frictional contact with the edges which deiine the slot.

With the insert embedded in a body of concrete or other material, and after removal of the form and slug, a nut N such as shown in Fig. 6 may be advanced sidewise through the slot until it has passed inside the enclosed space within the insert; it may then be turned over with its axis passing through the slot. When so positioned, a bolt B (see Fig. 7) may be entered through the slot and through the nut within the insert to effect an adjustable connection therewith. The bolt, it should also be noted, is free to slide lengthwise of the slot between the two ends thereof, the nut moving along with it to the extent permitted by the confines of the enclosure. When a number of supporting bolts are positioned with a plurality of such inserts, arranged in a line or otherwise, it is possible to adjust each bolt laterally within a, limited dis-- in a body of concrete or the like with one wall of the insert body remaining exposed upon a face of the concrete body, the insert body comprising two complementary parts of sheet metal defining between them a chamber closed on all sides and one of the parts being provided with out-turned feet adapted to engage a face 0f the other part, there being an opening in one of the engaged parts and, in register therewith, a deformable boss protruded. from the other engaged part and extended through the opening, adapted, upon application of a requisite force, to be offset suilir`c iently to provide an interlock between the two tance so as to provide aligned supports for pipes 4 or other structures which are to be sustained.V

The insert of my invention haspcertairr adl vantages because of its simplicity, ease of'assernbly, 'and certainty of its preventing'. ingress of concrete during the stage of iiuidity. The par-- tially displaced slug provides a tight closure which is ample to'v resist the entrance of fluid particles, yet, when the form. has been removed, it may be easily displaced inwardly andA then withdrawn outwardly through' therresulting slot which is of elongated form.. operation `of removing and withdrawing' the slug is very simplefand rapid. No appreciable expense is i-n- Volved in the production of such a slug closure,

nor in its removal from the insert.

I claim:

l. A concrete insert in which lis combined an apertured U-strap, a channel piece extended crosswise of the U-strap, and a locking bar e-X- tended through opposed wallsof the U`strap adjacent the center wall of thev channel piece adapted to prevent separation of the channel piece from the U-strap, th'e bairV ends being' protrud'ed'f'rom the-'A insert for keying'in a surrounding plastic body;

2. A concrete insert in which is combined an apertured U-strap, a channel vpiece extended crosswise of the U-strap and interengaging therewith in a manner to remain in a fixed p'osition lengthwisethereof, and a locking bar extended through opposed walls of the U-strap adjacent the center wall o the channel piece bottom adapted to prevent separation of the channel' piecel from the U-strap, the bar ends being protruded from the insert for keying within a surrounding plastic body.

3'. A concrete insert adapted for embedment parts, and a slug displaced inwardly, partially T but not completely, from the exposed insert wall,

the-metallieunion between the slug periphery andthe insert wall being relatively weak whereby; uponlappli'cation of a percussive force, the slug-isfadapted to sever completely its union with the insert wall and advance only into the enclosed spaceA within the insert body from which it may thereafter be withdrawn only through the wall opening vacated; by1 itself.

4. A concrete insert` adapted for embedment' in a concrete body or the like with one wall of the insert body remaining,v exposed upon aface of the concrete-body, the insert body comprising two complementary parts of sheet metal, each formed with. a' channel interilttingl and providing between thema closed chamber, and a slugipartially' severed but not completely from' the exiposed inert wall. andv displaced inwardly slightly, the metallicunion'between. the slug periphery and thev insert wall being relatively weak whereby', upon application of a percussive force, the slug will sever completely' its union withv thef insert' wall and adv-ance into and be received'- by saidl closed" chamber withinthe insert body from which it may thereafter be withdrawn. only through the wallopening vacated byl itself, sai-d opening being elongated and of less area than the exposed wall of the chamber of the. insert providingL a continuous ilangey surrounding said opening, and arranged to support a nut of a rod 0r bolt and permitting said rody or bolt a limited adjustment; and said slug completely closing said opening so as to exclude completely from said cham-ber concrete 0r the like during the molding of the body of concrete.

NICHOLAS. A. PREDAN. 

